you won't be needing them with us. at southwest, low fares never mean low service. ♪ if it matters to you, it matters to us. ♪ >> cbs sports thanks you for watching this presentation of the national football league. ,,,,,,,, could save you fifteen percent or more on car insurance. everybody knows that. well, did you know that when a tree falls in the forest and no one's around, it does make a sound? ohhh...ohhh...oh boy! i'm falling. everybody look out! ahhhhh...ugh. little help here. geico. fifteen minutes could save you...well, you know. anybody? captioning funded by cbs and ford >> stahl: we were given rare access to the u.s. military base at guantanamo bay where 164 suspected terrorists are being detained. this is khalid sheikh mohammed's holding cell. he and four other al qaeda suspects are on trial for the attacks of 9/11. i've heard people say, "look, he's trying ksm. why are we contorting ourselves? these guys slaughtered 3,000 innocent people. this was not the battlefield; these were people going to work."